Update docs/brokers.rst
Update docs/brokers.rst

Co-Authored-By: MatheusMiranda <6faf3a473c1bf7863f2eb74400dd6142ec07131e@gmail.com>
RasaHQ/rasa_nlu,RasaHQ/rasa_core,RasaHQ/rasa_nlu,RasaHQ/rasa_core,RasaHQ/rasa_core,RasaHQ/rasa_nlu